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Published August 22, 2025 ©

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ESP32-S3-POE-ETH-8DI-8DO

ndustrial ESP32-S3 Control Board With 8-Channel Digital Input & Output, Built-in Xtensa 32-bit LX7 Dual-core Processor, Up To 240MHz,

COMPONENTS Hardware components

WIZnet - W5500

x 1


PROJECT DESCRIPTION

Introduction

The ESP32‑S3‑POE‑ETH‑8DI‑8DO is a versatile industrial control board built around the high-performance ESP32‑S3 microcontroller, featuring dual-core Xtensa LX7 CPUs (up to 240 MHz). It integrates multiple communication interfaces—Wi-Fi, Bluetooth LE, Ethernet (via W5500 and optionally PoE), RS485, CAN, as well as 8 isolated digital inputs and 8 outputs, all protected by comprehensive isolation circuits. The board is enclosed in a rail-mountable ABS case, making it well-suited for industrial settings

Industrial ESP32-S3 Control Board With 8-Channel Digital Input & Output, front view

Features

  • Based on ESP32-S3 microcontroller with Xtensa 32-bit LX7 dual-core processor, capable of running at 240 MHz
  • Integrated 2.4GHz Wi-Fi and Bluetooth LE dual-mode wireless communication, with excellent RF performance
  • The outputs adopt Darlington transistors with optocoupler isolation, delivering higher drive capability with a sink current of up to 500 mA, and feature built-in flyback diode protection
  • Supports passive and active digital input, with bi-directional optocoupler isolation. The digital output supports digital input linkage control
  • Onboard isolated RS485 interface, for connecting to various RS485 Modbus industrial modules or sensors
  • Onboard isolated CAN interface, for connecting to various CAN devices
  • Onboard pin header, allowing access to other devices
  • Onboard USB Type-C port for power supply, firmware downloading and debugging
  • Onboard power supply screw terminal, supports 7~36V wide voltage input, suitable for industrial applications
  • Onboard RTC chip, supports scheduled tasks
  • Onboard W5500 Ethernet chip for extending 10/100Mbps network port through SPI interface
  • Built-in PoE module for PoE capability (compliant with IEEE 802.3af standard)
  • Onboard optocoupler isolation to prevent interference from external circuit
  • Onboard digital isolation to prevent interference from external signal
  • Onboard unibody power supply isolation, providing stable isolated voltage, no extra power supply required for the isolated terminal
  • Onboard TF card slot for external TF card storage of images and files
  • Built-in buzzer, RGB LED, power supply, RS485 and CAN TX/RX indicators for monitoring the operating status of the devices
  • Rail-mounted protective case, easy to install, safe to use

Application Scenarios

 

 

Board introduction

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